Gas burner



C. K. ERIKSTRUP GAS BURNER Fi led Aug. 29. 1923 'iil Patented Aug. 26,1924.

UNITED STATES CHRISTEN K. ERIKSTRUP, 0F LUCK, WISCONSIN.

GAS BURNER.

Application filed August 29, 1923.

To all whom it may concern:

Be it known that I, CHRIsrnN 1i. ERIK- STRUP, a citizen of the UnitedStates, residing at Luck, in the county of Polk and State of Wisconsin,have invented certain new and useful Improvements in Gas Burners; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention provides an extremely simple and highly eliicienthydro-carbon burner especially adapted for burning of gas coinmingledwith air at highest possible efficiency. Generally stated, the inventionconsists of the novel construction, combination and arrangement of partshereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings:

Fig. l is a plan View of the improved burner, some parts being brokenaway; and

Fig. 2 is a vertical section taken on the line 22 of Fig. 1.

This improved burner is adapted to be applied in any and all types ofgas or hydrocarbon burning stoves, either new or as a substitute for oldburners, and it may beassumed to be arranged just below the ordinaryutensil-supporting grid, not shown, but the upper surface of which willbe approximately 011 the line a a of Fig. 2.

The main body member of the burner is in the form of a shell or pressedmetal dome 3 adapted to rest on top of a stove or any other flatsurface. The top of this dome 3 is formed with concentric corrugationsand, at its center, it terminates in a large axial opening 4;. Near itslower edge, the dome 3' is provided with circumferentially spaced airintake ports 5.

Mounted in and extending above thecen tral passageway a is anapproximately cupshaped burner head 6, the rim of which is provided withcircumferentially spaced bearing feet or lugs 7 that overlap theupturned edge of the dome adjacent the passageway l. This burner head 6is provided with a centrally located depending sleeve 6, into which istelescoped and secured the upper end of a short burner tube 8 thatextends centrally upward from a disc-like plate 9. The

Serial No. 659,935.

plate 9 forms the top of a mixing chamber, the bottom of which is in theform of a bowl or depressed sheet metal plate 10' having an outturnedrim. The out-turned rim of the bowl 10 is spaced vertically from the rimof the plate 9 by lugs 11 that are circumferentially spaced so as toafford circumferentially extended primary air supply passageway 12,which, except for said lugs 11, extend completely around the primarymixing chamber 13 formed between the bowl 10 and top plate 9.Preferably, the lugs 11 are spot-welded to the plate 9 and the bowl 10is rigidly but detachably secured to said lugs by small screws 14. Thelugs 11 are upturned and bear against the corrugated top of the dome 3.

The numeral 15 indicates a gas supply pipe that is extended radiallyinto the dome 8 below the bowl 10, is provided with a closed end andnear its end is provided with a burner tip 16 that extends axiallyupward through the bottom of the bowl 10 so that it will discharge gasinto the primary mixing chamber 13 The burner tip 16, therefore, standsaxially in line with and below the tube 8 and here it may be noted thatthe said tube 8, at its upper end, is expanded so that it ispern'ianently secured within the upwardly flaring passageway of thesleeve 6.

Detachably seated on the rim of the burner head 6 is a disc-likedeflecting cap 17 that has circumferentially spaced rest lugs or feet 18that rest upon and telescope slightly into the rim of said head 6. Therim of the cap 17, except for the lugs 18, is spaced from the rim of theburner cap 6 to form a nearly complete annular discharge passageway 19'.The head 6 and the cap 17 are thus spaced to afford a secondary mixingchamber 20'.

By the use of this improved burner, the gas will be delivered throughthe pipe 15 and tip 16 into the primary combustion chamber 13, where itwill be commingled with air drawn into said chamber through the substantially annular air intake passageway 12. Air to the interior of thedome 3 will, of course, be supplied through the intake ports 5. The airand gas will be quite thoroughly commingled within the primary mixingchamber 13, but from thence it will be drawn in a quite rapidly movingstream through the contracted tube or neck portion 8 and will lUU thenbe delivered into the secondary mixing chamber 14 and again expandedbefore it reaches the combustion point. From thesecondary mixing chamber20, the gas, diluted with air, will be discharged in a substantiallyannular stream through the substantially annular passageway 19, and asit is thus discharged, it will be further commingled with an additionalsupply of air drawn in through the dome and discharged through theannular passageway 41: formed be tween thetop of the dome and the bottomof the burner cap 6.

It is important to note that a large amount of air will be confined inthe dome 3 and that the movement of air through said dome will be veryslow. This will cause the air to be preheated within the dome, so thatpreheated air will be delivered into the primary mixing chamber 13' andthe air that is delivered through the central passageway a and under andaround the burner head 6 will also be preheated. This preheating of theair accomplishes several important things' Inthe first place, it insuresa better and quicker mixing of the gas and air. In the second place, itproduces a higher temperature in the flame and results in a very material saving of gas.

It will, of course, be understood that the whole-top surface of the domewill absorb the downwardly radiated heat that is usually wasted and, byconduction, transfers the heat units to the air, which sooner or laterenters into the production of the flame. The

corrugation of the top of the dome increases its heat-absorbingeliiciency.

WVhen the burner is in action, the metallic walls of the primary mixingchamber 13 will get quite hot, so that the air and gas will be preheatedwhile they are being commingled in the said chamber and the comminglingof the two will be facilitated by the increased temperature. Thetemperature of the commingled air and gas will be raised to a stillhigher point when they are expanded and further commingled in thesecondary mixing chamber 20. The combustion will take place just outwardof the annular dis charge passageway 19 and this combustion, as alreadyindicated, will be further increased in intensity by oxygen suppliedfrom the air discharged through the passa;,,,eway i and under the bottomof the cap 6.

It is important to note that the temperature of the gas and aircommingled ther with is, by the above described burner, grad uallystepped up from its normal temperature toward the flashing point.

In the action of the burner described, the gas will be reduced inrichness by a supply; of air commingled therewith under high enoughtemperature to insure thorough mixing; then the partially reduced gas iscarried at relatively high velocity through a contracted neck orpassageway into the secondary mixing chamber, which action alsofacilitates thorough mixing of the air and gas; and then the air and gasare again expanded and increased in temperature and brought to a pointclose to the flashing point of the gas. Under an extremely intenseflame, the commingled air and gas in the secondary mixing chamber 20 maysometimes become ignited, but this will do no harm and the combustionwill be rendered complete by the air supplied to the flame from the passageway 4.

From the foregoing, it is evident that my invention is not limited tothe details of construction above described, but, on the contrary, iscapable of modification within the principles herein disclosed andwithin the scope of the claims.

What I claim is: p

1. A burner of the kind described com prising a primary mixing chamberhaving a surrounding substantially continuous air intake passage, a gaspipe connected to said mixing chamber through the bottom thereof,asecondary mixing chamber overlying said primary mixing chamber, ascontracted neck connecting said two mixing chambers, said secondarymixing chamber having a. surrounding substantially continuousgas-discharge passageway. I

2. The structure defined in claim 1 in further combination with a domeenclosing said primary mixing chamber and having a central passagewayspaced from the bottomof said secondary mixing chamber toafford asubstantially continuous air discharge passageway.

3. The structure defined in claim 1 in further combination with a domeenclosing said primary mixing chamber and supporting said secondarymixing chamber but having a central passageway in its top, the edge ofsaid dome surrounding said passageway being spaced from the bottom ofsaid second ary mixing chamber to afford a substantially continuous airdischarge passageway around said secondary mixing chamber, said domehaving air intake means.

4. The combination with a dome having air intake means and provided inits top with a central air passageway, a cup-like burner head havinglugs resting on said dome but having its body spaced therefrom to afiordan air discharge passageway around said head, a deflecting cap seated onsaid burner head but spaced therefrom to afford a substantiallycontinuous gas-discharge passageway, said head and cap affording asecondary mixing chamber, a tubular neck extended axially downward fromsaid burner head and having a disc-like outstanding plate at its lowerend, a bowl secured to but spaced from said plate to afford a primarymixing chamber having a substantially continuous air intake passageway,and a gas pipe extended into said dome and connected through the bottomof said bowl, said bowl and overlying plate con- -i' stituting a primarymixing chamber.

5. The structure defined in claim 4 in which said bowl is detachablysecured to the overlying plate.

6. The structure defined in claim 4 in which spacing lugs are securedbetween the 10 rim of said bowl and the rim of the overlying plate, thesaid lugs being upwardly extended into contact with the top of saiddome.

In testimony whereof I affix my signature.

GHRISTEN K ERIKSTRUP.

